Display Device and Driving Method Thereof

1. A display device comprising: a plurality of gate lines each for transmitting a gate signal; a plurality of data lines each for transmitting a data voltage; a first storage line for transmitting a first storage signal of which a voltage level is changed at least once for one frame; and a first pixel connected to a first gate line among the gate lines, a first data line among the data lines, and the first storage line, wherein the first pixel includes: a first subpixel including a first switching element connected to the first gate line and the first data line, a first liquid crystal capacitor connected to an output terminal of the first switching element, and a first storage capacitor; a second subpixel including a second switching element connected to the first gate line and the first data line, a second liquid crystal capacitor connected to an output terminal of the second switching element, and a second storage capacitor; and a third subpixel including a third switching element connected to the first gate line and the first data line, and a third liquid crystal capacitor connected to an output terminal of the third switching element, and the first storage capacitor and the second storage capacitor are connected to the first storage line.

2. The display device of claim 1 , further comprising a storage line driver for changing the voltage level of the first storage signal applied to the first storage line at least once after the first to third switching elements are turned off.

3. The display device of claim 2 , wherein the voltage level of the first storage signal swings between a first voltage level and a second voltage level with one horizontal period as a period.

4. The display device of claim 2 , wherein the voltage level of the first storage signal rises after the first to third switching elements are turned off in a frame in which the first data line transmits a positive data voltage, and the voltage level of the first storage signal falls after the first to third switching elements are turned off in a frame in which the first data line transmits a negative data voltage.

5. The display device of claim 2 , wherein a changing amount of a charged voltage of the first liquid crystal capacitor is different from a changing amount of a charged voltage of the second liquid crystal capacitor when the voltage level of the first storage signal is changed.

6. The display device of claim 5 , wherein the third subpixel further includes a third storage capacitor connected to a common storage line for transmitting a predetermined voltage for one frame.

7. The display device of claim 1 , further comprising a second storage line for transmitting a second storage signal having an opposite waveform to that of the first storage signal.

8. The display device of claim 7 , further comprising a second pixel adjacent to first pixel in a row direction, wherein the second pixel includes: a fourth subpixel including a fourth switching element connected to the first gate line and a second data line among the data lines, a fourth liquid crystal capacitor connected to an output terminal of the fourth switching element, and a fourth storage capacitor; a fifth subpixel including a fifth switching element connected to the first gate line and the second data line, a fifth liquid crystal capacitor connected to an output terminal of the fifth switching element, and a fifth storage capacitor; and a sixth subpixel including a sixth switching element connected to the first gate line and the second data line, and a sixth liquid crystal capacitor connected to an output terminal of the sixth switching element, and the fourth storage capacitor and the fifth storage capacitor are connected to the second storage line.

9. The display device of claim 8 , wherein a changing amount of a charged voltage of the fourth liquid crystal capacitor is different from a changing amount of a charged voltage of the fifth liquid crystal capacitor when a voltage level of the second storage signal is changed.

10. The display device of claim 9 , wherein the sixth subpixel further includes a sixth storage capacitor connected to a common storage line for transmitting a predetermined voltage for one frame.

11. The display device of claim 7 , wherein the first storage line and the second storage line are provided on opposite sides with respect to the first gate line.

12. The display device of claim 7 , further comprising a second pixel adjacent to the first pixel in a column direction, wherein the second pixel includes: a fourth subpixel including a fourth switching element connected to a second gate line and the first data line, a fourth liquid crystal capacitor connected to an output terminal of the fourth switching element, and a fourth storage capacitor; a fifth subpixel including a fifth switching element connected to the second gate line and the first data line, a fifth liquid crystal capacitor connected to an output terminal of the fifth switching element, and a fifth storage capacitor; and a sixth subpixel including a sixth switching element connected to the second gate line and the first data line, and a sixth liquid crystal capacitor connected to an output terminal of the sixth switching element, and the fourth storage capacitor and the fifth storage capacitor are connected to the second storage line.

13. The display device of claim 12 , wherein a changing amount of a charged voltage of the fourth liquid crystal capacitor is different from a changing amount of a charged voltage of the fifth liquid crystal capacitor when a voltage level of the second storage signal is changed.

14. The display device of claim 1 , wherein the display device includes a plurality of pixels connected to the gate lines and the data lines, the gate lines and the pixels are divided into a plurality of blocks, and the display device further includes a plurality of storage transmitting lines for transmitting the first storage signal to the plurality of blocks.

15. The display device of claim 14 , wherein the first storage signals applied to different blocks among the blocks are different from each other, and a same first storage signal is applied to a same block.

16. The display device of claim 15 , wherein after a gate-on voltage is transmitted to all of the gate lines included in one of the blocks, a voltage level of the first storage signal applied to the block is changed.

17. A method for driving a display device, the display device comprising: a plurality of gate lines; a plurality of data lines; a first storage line for transmitting a first storage signal; and a first pixel connected to a first gate line among the gate lines, a first data line among the data lines, and the first storage line, wherein the first pixel includes: a first subpixel including a first switching element connected to the first gate line and the first data line, a first liquid crystal capacitor connected to an output terminal of the first switching element, and a first storage capacitor; a second subpixel including a second switching element connected to the first gate line and the first data line, a second liquid crystal capacitor connected to an output terminal of the second switching element, and a second storage capacitor; and a third subpixel including a third switching element connected to the first gate line and the first data line, and a third liquid crystal capacitor connected to an output terminal of the third switching element, the method comprising: transmitting a gate-on voltage to the first gate line and then transmitting a gate-off voltage to the first gate line; and after the gate-off voltage is transmitted to the first gate line, changing a voltage level of the first storage signal applied to the first storage capacitor and the second storage capacitor at least once during a frame.

18. The method of claim 17 , wherein the voltage level of the first storage signal swings between a first voltage level and a second voltage level with one horizontal period as a period.

19. The method of claim 17 , further comprising: transmitting a positive data voltage to the data lines in a first frame; and transmitting a negative data voltage to the data lines in a second frame, wherein in the first frame, the voltage level of the first storage signal rises after the first to third switching elements are turned off, and in the second frame, the voltage level of the first storage signal falls after the first to third switching elements are turned off.

20. The method of claim 17 , wherein the display device includes a plurality of pixels connected to the gate lines and the data lines, the gate lines and the pixels are divided into a plurality of blocks, the method further includes changing the voltage level of the first storage signal applied to a block of the plurality of blocks after the gate-on voltage is transmitted to all of the gate lines included by the block, the first storage signals applied to different blocks are different from each other, and a same first storage signal is applied to a same block.